{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2025-38029", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2025-38029", "idYear": 2025, "status": "PUBLISHED", "publishedAt": "2025-06-18T09:33:17.632Z", "updatedAt": "2026-10-21T12:36:37.992Z", "importedAt": "2026-10-24T01:57:34.152Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "kasan: avoid sleepable page allocation from atomic context", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nkasan: avoid sleepable page allocation from atomic context\n\napply_to_pte_range() enters the lazy MMU mode and then invokes\nkasan_populate_vmalloc_pte() callback on each page table walk iteration. \nHowever, the callback can go into sleep when trying to allocate a single\npage, e.g. if an architecutre disables preemption on lazy MMU mode enter.\n\nOn s390 if make arch_enter_lazy_mmu_mode() -> preempt_enable() and\narch_leave_lazy_mmu_mode() -> preempt_disable(), such crash occurs:\n\n[ 0.663336] BUG: sleeping function called from invalid context at ./include/linux/sched/mm.h:321\n[ 0.663348] in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 2, name: kthreadd\n[ 0.663358] preempt_count: 1, expected: 0\n[ 0.663366] RCU nest depth: 0, expected: 0\n[ 0.663375] no locks held by kthreadd/2.\n[ 0.663383] Preemption disabled at:\n[ 0.663386] [<0002f3284cbb4eda>] apply_to_pte_range+0xfa/0x4a0\n[ 0.663405] CPU: 0 UID: 0 PID: 2 Comm: kthreadd Not tainted 6.15.0-rc5-gcc-kasan-00043-gd76bb1ebb558-dirty #162 PREEMPT\n[ 0.663408] Hardware name: IBM 3931 A01 701 (KVM/Linux)\n[ 0.663409] Call Trace:\n[ 0.663410] [<0002f3284c385f58>] dump_stack_lvl+0xe8/0x140\n[ 0.663413] [<0002f3284c507b9e>] __might_resched+0x66e/0x700\n[ 0.663415] [<0002f3284cc4f6c0>] __alloc_frozen_pages_noprof+0x370/0x4b0\n[ 0.663419] [<0002f3284ccc73c0>] alloc_pages_mpol+0x1a0/0x4a0\n[ 0.663421] [<0002f3284ccc8518>] alloc_frozen_pages_noprof+0x88/0xc0\n[ 0.663424] [<0002f3284ccc8572>] alloc_pages_noprof+0x22/0x120\n[ 0.663427] [<0002f3284cc341ac>] get_free_pages_noprof+0x2c/0xc0\n[ 0.663429] [<0002f3284cceba70>] kasan_populate_vmalloc_pte+0x50/0x120\n[ 0.663433] [<0002f3284cbb4ef8>] apply_to_pte_range+0x118/0x4a0\n[ 0.663435] [<0002f3284cbc7c14>] apply_to_pmd_range+0x194/0x3e0\n[ 0.663437] [<0002f3284cbc99be>] __apply_to_page_range+0x2fe/0x7a0\n[ 0.663440] [<0002f3284cbc9e88>] apply_to_page_range+0x28/0x40\n[ 0.663442] [<0002f3284ccebf12>] kasan_populate_vmalloc+0x82/0xa0\n[ 0.663445] [<0002f3284cc1578c>] alloc_vmap_area+0x34c/0xc10\n[ 0.663448] [<0002f3284cc1c2a6>] __get_vm_area_node+0x186/0x2a0\n[ 0.663451] [<0002f3284cc1e696>] __vmalloc_node_range_noprof+0x116/0x310\n[ 0.663454] [<0002f3284cc1d950>] __vmalloc_node_noprof+0xd0/0x110\n[ 0.663457] [<0002f3284c454b88>] alloc_thread_stack_node+0xf8/0x330\n[ 0.663460] [<0002f3284c458d56>] dup_task_struct+0x66/0x4d0\n[ 0.663463] [<0002f3284c45be90>] copy_process+0x280/0x4b90\n[ 0.663465] [<0002f3284c460940>] kernel_clone+0xd0/0x4b0\n[ 0.663467] [<0002f3284c46115e>] kernel_thread+0xbe/0xe0\n[ 0.663469] [<0002f3284c4e440e>] kthreadd+0x50e/0x7f0\n[ 0.663472] [<0002f3284c38c04a>] __ret_from_fork+0x8a/0xf0\n[ 0.663475] [<0002f3284ed57ff2>] ret_from_fork+0xa/0x38\n\nInstead of allocating single pages per-PTE, bulk-allocate the shadow\nmemory prior to applying kasan_populate_vmalloc_pte() callback on a page\nrange.", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "3c5c3cfb9ef4da957e3357a2bd36f76ee34c0862", "status": "affected", "versionType": "git", "lessThan": "c33a7fe6dda591694cebfe15abf4644abb4f61c0" }, { "version": "3c5c3cfb9ef4da957e3357a2bd36f76ee34c0862", "status": "affected", "versionType": "git", "lessThan": "468e7d51dba433a72dcd63eee6db9ad721d39ac5" }, { "version": "3c5c3cfb9ef4da957e3357a2bd36f76ee34c0862", "status": "affected", "versionType": "git", "lessThan": "6748dd09196248b985cca39eaf651d5317271977" }, { "version": "3c5c3cfb9ef4da957e3357a2bd36f76ee34c0862", "status": "affected", "versionType": "git", "lessThan": "b6ea95a34cbd014ab6ade4248107b86b0aaf2d6c" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "5.5", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "5.5" }, { "version": "6.6.160", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.114", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.14.9", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.14.*" }, { "version": "6.15", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }